Syntheses and Crystal Structures of Mono-and Binuclear Copper(Ⅱ) Mixed-ligand Complexes Involving Schiff Base

1 INTRODUCTION The chemistry of copper compounds has been extensively investigated and the relationship be- tween structure and reactivity, ranging from indus- trial catalysis to biochemistry activity, is of major importance. For binuclear copper(II) complexes equa- torially bridged by pair of hydroxide[1] or alkoxide[2, 3] groups, satisfactory linear correlation is found be- tween the Cu–O–Cu bridging angle and spin coupling between the metal centers. However, for binuclear copper(I…     

Synthesis and Characterization of Three Vanadium（Ⅴ） Complexes Incorporating Tridentate Hydrazone Ligands of Thiophene-2-carboxylic Hydrazide and 2-Furoic Acid Hydrazide

Divanadium(Ⅴ) complex [VO(aptch)(μ-OCH3)]2(1) and two monovanadium(Ⅴ) complexes [VO(apfah))(OEt)](2a and 2b,H2aptch = 2-hydroxyacetophenone thiophene-2-car-boxylic hydrazone,H2apfah = 2-hydroxyacetophenone 2-furoic acid hydrazone) have been synthesized and characterized.Single-crystal X-ray diffraction studies reveal that 1 is a cen-trosymmetric dimer bridged by two methoxido O-atoms.Complex 1 crystallizes in the monoclinic crystal system,space groups P21/c with a = 7.4825(4),b = 17.0928(11),c = 11.6961(7) ,β = 98.172(4)o,Z = 2,F(000) = 728,μ = 0.829 mm-1,the final R = 0.0457 and wR = 0.1137 for 2654 observed reflections with I > 2(I).The vanadium(V) is coordinated to the tridentate ligand,ethanol molecule to form a distorted square-pyramidal geometry,complexes 2a and 2b.Although 2a and 2b have the same asymmetric unit,they belong to different space groups.Complex 2a crystallizes in the monoclinic crystal system,space groups P21/n with a = 10.2293(2),b = 15.6660(3),c = 10.6298(2) ,β = 116.259(1)o,Z = 4,μ = 0.676 mm-1;complex 2b crystallizes in the triclinic crystal system,space groups P with a = 8.2808(4),b = 9.4704(5),c = 10.0819(5) ,α = 86.133(3),= 81.956(3),γ = 80.248(3)o,Z = 2 and μ = 0.670 mm-1.The hydrogen bonds are found to exist in 2b only.The crystal structure is stabilized by intermolecular hydrogen bonds of C-H···O.     

Synthesis and Crystal Structure of Co(C_6NO_2H_4)_3. H_2O

1INTRoDUCTIONAlotofresultsoncobaltcomplexstructureshavebeenreportedforseveraldecades.Theinterestofresearchinthisfieldhasneverbeenreducedbecausethecobaltcomplexesplayaveryimportantroleinthelifescienceandcatalysis,etc[1-6).WereportherethesynthesisandstructureofcomplexCo(C,NO,H'),.H,O.2EXPERIMENTALAllreagentsandsolventsusedareofARgradefromcommericalsourceswithoutfurtherpurification.ThetitlecompoundCo(C,NO,H,),.H,Owassynthesizedbythefollowingmethod.When2.4g(ca.1mmol)ofCoCl2.6H2Ow…     

Synthesis and Crystal Structure of a New cis-Dioxovanadium （V） Complex with Pyruvic Acid Isonicotinyl Hydrazone （PAINH）

1 INTRODUCTION The interest in vanadium chemistry from a biolo-gical and pharmacological perspective has explodedover the past 20 years. This is mainly based on thediscoveries of the insulin-like effect of vanadium compounds[1, 2], and the presence of vanadium in certainhaloperoxidases and nitrogenases[3, 4]. Vanadium complexes with organic ligands mightbe candidates for therapy of diabetes, consequentlydesign and synthesis of new complexes are of greatinterest recently[5, 6]. On consid…     

2-羟基-1-萘甲醛半碳酰腙铬(Ⅲ)配合物的合成和晶体结构

本文合成了2-羟基-1-萘甲醛半碳酰腙铬(Ⅲ)单核配合物,通过红外、紫外、荧光光谱和单晶X-射线衍射等方法对其结构进行了表征。其晶体结构属于单斜晶系,空间群C2/c。光谱数据表明：配体2-羟基-1-萘甲醛半碳酰腙作为三齿螯合剂,通过酚氧,亚胺基氮和酮氧与铬(Ⅲ)离子配位。其铬(Ⅲ)中心为扭曲的六配位八面体几何构型。     

Synthesis,Crystal Structure and Interaction with DNA of a Novel Chromium（Ⅲ） Complex Containing Salicylaldehyde Semicarbazone

The novel chromium（Ⅲ） complex with salicylaldehyde semicarbazone was synthesized and characterized by IR spectra and single-crystal X-ray diffraction analysis. The crystal belongs to the orthorhombic system, space group Pbca with a = 8.9849（13）, b = 12.0475（16）, c = 34.522（5）A, V = 3736.9（9）A3, Z = 8, C16H18C1CrN6O5, Mr= 461.81, De= 1.642 g/cm^3, F（000） = 1896,A（MoKα） = 0.799 mm^-1, the final R = 0.0370 and wR = 0.0827 for 2908 observed reflections with I 〉 2σ（I）. The interaction between the chromium（Ⅲ） complex with calf thymus DNA （Ct-DNA） has been investigated by absorption spectroscopy, fluorescence spectroscopy and viscosity measurements. The results indicated that the complex was bonded to Ct-DNA through a non-classical intercalative mode.     

双核钒席夫碱配合物[VO(μ2-O)(o-Vanillin-en)]2的合成、结构及与DNA相互作用

在甲醇体系中乙酰丙酮氧钒与邻香草醛缩牛磺酸钾席夫碱在乙二胺存在下反应得到一个双核钒配合物。通过红外光谱和X-射线单晶衍射对其进行了表征。晶体结构表明该化合物的晶体属于三斜晶系，P1空间群，晶胞参数为a=0.898 67(19)nm，b=1.159 3(3) nm，c=1.200 0(3) nm，α=106.872(3)°，β=102.718(4)°，γ=94.905(3)°，Z=2。通过紫外吸收光谱法和循环伏安法研究了钒配合物与小牛胸腺DNA间的相互作用。紫外吸收光谱法得到配合物与DNA的结合常数为1.77×10⁴ dm³·mol^-1。     

Synthesis, Crystal Structure and Properties of a Novel Vanadium（Ⅴ） Oxoperoxo Complex Incorporating a Tridentate Hydrazone Ligand

A novel vanadium(V) oxoperoxo complex [VOO2(APTCH)(CH3OH)] (HAPTCH = 2-acetylpyridine thiophene-2-carboxylic hydrazone) has been synthesized and characterized by IR, TGA and X-ray single-crystal structure determination. The complex crystallizes in the monoclinic system, space group P21/c with a = 11.232(2), b = 10.762(2), c = 112.613(3), β = 99.44(3)°, V = 1504.1(5)3, Dc = 1.657 g·cm-3, Z = 4, F(000) = 768, μ = 0.827 mm-1, the final R = 0.0392 and wR = 0.1073 for 2266 observed reflections with I > 2σ(I). Single-crystal X-ray diffraction studies reveal that the vanadium(V) is coordinated by a tridentate ligand, methanol molecule and peroxo group to form a pentagonal-bipyramidal geometry. The crystal structure is stabilized by intermolecular hydrogen bonds of O-H···N and C-H···O.     

基于LBO晶体的高效千赫兹皮秒量级光学参量产生器

本文所述的光学参量产生器(OPG)是基于高效的三硼酸锂(LBO)晶体,由倍频半导体激光Nd:YVO4振荡放大(MOPA)系统作为泵浦辐射源.根据Boydand Kleinman理论:聚焦效应可以使泵功率密度为50 GW/cm2,这远远低于LBO晶体的损伤阈值80 GW/cm2,发生简并时其总的转换效率可达到72%.当整体转换效率达到50%时,OPG可调谐范围的范围可以从760 nm到1770 nm.当转换效率低于40%(M21.3)时,光束质量是非常优良的.通过种子光注入OPG,10 nm(RMS)谱线带宽可以被缩窄.种子激光注入可以表示为波长922.54 nm的信号.30 n W种子CW具有足够的功率可以将光谱宽度减少为0.1 nm(RMS).测量种子光注入OPG脉冲持续时间为9 ps(FWHM).这会导致时间带宽积为1.30,这是sech2型脉冲理论极限为0.315的4.1倍.     

新型铜配合物[Cu(PyPt)(NO3)2]合成、结构、表征及其与DNA相互作用

本文报道了新型铜配合物[Cu(PyPt)(NO3)2](HPyPt是N-2-吡啶基-N'-苯基硫脲)的合成、结构、波谱表征及其与DNA相互作用研究.该配合物属三斜品系P1空间群,其中a=0.761 52(15)nm,b=0.80957(16)nm,c=1.311 3(3)nm,α=76.01(3)°,β=89.59(3)°,γ=68.24(3)°,V=0.7255(2)nm3,Z=2.利用荧光光谱法、紫外光谱法和粘度法初步研究了[Cu(PyPt)(NO3)2]与小牛胸腺DNA的相互作用,计算其与DNA结合常数Kb为1.63×103 L·mol-1.